It depends on how frequent these events are. If it's perhaps one per second, I don't see a problem with sending SIGUSR1 or so to the script.

Otherwise I'd just suggest to use sockets, which tend to be easier to use non-blockingly than named pipes.

In reply to Re: using $SIG as an IPC interrupt? by moritz
in thread using $SIG as an IPC interrupt? by bobbob

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